我有属性名称，但 req.body.name1 抛出未定义

Question

我查看了与相同问题相关的其他答案，但我无法弄明白。有人可以帮助我吗？

这是我的 main.js 文件：

    app.get('/addbook', function (req,res){
    res.render('addbook.html');
    });
    app.post('/bookadded', function (req,res) {
      // saving data in database
      let sqlquery = "INSERT INTO books (name, price) VALUES (?,?)";
      // execute sql query
      let newrecord = [req.body.name1, req.body.price];
      db.query(sqlquery, newrecord, (err, result) => {
        if (err) {
          return console.error(err.message);
        }
        else
        res.send(' This book is added to database, name: '+ req.body.name + ' price '+ req.body.price);
        });

这是我的 addbook 文件的主体：

<!doctype html>
<html>
  <head>
    <title>This is the addbook page</title>
  </head>
  <h1> This is the add book page </h1>
  <body>
    <p>Please  fill related data to add the book to database: </p>
  <form action="/bookadded" method="POST">
        <input type="text" name="name1" />
        <input type="text" name="price" />
        <input type="submit" />
  </form>
  </body>
</html>

这是错误：

TypeError: 无法读取未定义的属性 'name1' 在 /home/cmesa001/lab3/routes/main.js:41:37

这是index.js:

var bodyParser = require ('body-parser')
var express = require ('express')

const mysql = require('mysql');
const app = express()
const port = 8000

const db = mysql.createConnection ({
    host: 'localhost',
    user: 'root',
    password: 'descarcare',
    database: 'myBookshop'
});
// connect to database
db.connect((err) => {
    if (err) {
        throw err;
    }
    console.log('Connected to database');
});
global.db = db;

// new code added to your Express web server
require('./routes/main')(app);
app.use(bodyParser.urlencoded({ extended: true }))
app.set('views',__dirname + '/views');
app.set('view engine', 'ejs');
app.engine('html', require('ejs').renderFile);
app.listen(port, () => console.log(`Example app listening on port ${port}!`))

network tab on developer tools

Answer 1

在将路线附加到 express 之前，将代码中的 app.use(bodyParse.urlencoded({ extended: true })) 上移。添加中间件和东西的顺序来表达问题。我通常先添加头盔，然后是 bodyParser、compression、morgan，然后再添加这些路由。

Answer 2

您的输入名为 "name1"，您的服务器需要 "name"

更改这个：

 res.send(' This book is added to database, name: '+ req.body.name + ' price '+ req.body.price);

为此：

 res.send(' This book is added to database, name: '+ req.body.name1 + ' price '+ req.body.price);

我有属性名称，但 req.body.name1 抛出未定义

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我有 属性 名称，但 req.body.name1 抛出未定义

I have the property name but req.body.name1 throws undefined

html

node.js

body-parser

我有属性名称，但 req.body.name1 抛出未定义